Air filter elbow



FIG. 1 is a perspective view of an air filter elbow showing our design;

FIG. 2 is a top view of the air filter elbow shown in FIG. 1;

FIG. 3 is a bottom view of the air filter elbow shown in FIG. 1;

FIG. 4 is a side elevation view of the air filter elbow shown in FIG. 1;

FIG. 5 is a front view of the air filter elbow shown in FIG. 1; and,

FIG. 6 is an end view of the air filter elbow shown in FIG. 1. 

CLAIM We claim the ornamental design of an air filter elbow, as shown and described. 